i have installed Gentoo Linux yesterday and i had a working network card.
Before i compiled my kernel i choosed to support my card (RealTek 8139C) and compiled it. but i can get it working. when i run "cat /proc/pci" i have my card in the list. and when i run "ifconfig -a" i have only "lo" and i don't have "eth0".

could you please tell me what have i done wrong and what can i do to fix it.